[c-nsp] IP issues with 3560

[Marcus.Gerdon]

Hi Sophan,

something seems to be wrong or missing here.

1st option:

If your mask 255.255.0.0 given is correct there'd have to be a plain L2-segment without any L3 device in the middle, as 10.125.25.5 and 10.125.19.x reside in the same subnet. Of course 10.125.19.x also has to be 255.255.0.0 then. So there'd be no need to do any routing on the 3560's and supposedly you have a addressing/subnetting/design problem.

2nd option:

The mask it is/should be with the network design is in fact 255.255.255.0 because of L3 devices in between are intended. Then possibly the mask on host 10.125.25.5 is wrong so it doesn't try to route across the gateway. What's exactly neede for routing to work I can't say as you provided not enough details about your setup. In case 10.125.25/24 and 10.125.19/24 both have an L3 interface on the 3560 (ip routing enabled of course) no routing entries are needed on the 3560 as both subnets are connected. With this setup if you can't reach the hosts across the 3560 your host configuration has a problem.
 
Nothing hints that any magic is needed on the 3560, I tend to suggest you should draw out your network in regards to L2 and L3 domains. Supposedly as said above you'll find the problem somewhere with the addressing.



regards,

Marcus



> -----Ursprüngliche Nachricht-----
> Von: cisco-nsp-bounces at puck.nether.net 
> [mailto:cisco-nsp-bounces at puck.nether.net] Im Auftrag von Sophan Pheng
> Gesendet: Montag, 28. Juni 2010 18:36
> An: cisco-nsp at puck.nether.net
> Betreff: [c-nsp] IP issues with 3560
> 
> Hello All,
> 
> I have not dealt with this before so any help/comments would 
> be great and much appreciated...
> 
> We have the following IP's that need to be able to ping each 
> other through this box. I have a server sitting at 
> 10.125.25.5/255.255.0.0 that connects to the rest of the 
> network via a microwave link. It connects to the 10.125.19.x 
> segment to upload data to an archiving server. I need to be 
> able to ping 25.2 from 19.x and vice versa.
> 
> Can you please give some assistance as to how I can 
> accomplish this? So far I have only been able to get the 25.5 
> to ping the Vlan it is connected to, but not anything on the 
> other side (19.x) even with IP Routing enabled. Currently, I 
> have reset it to factory to start from scratch.
> 
> Can anybody suggest what the problem could be?
> 
> Thanks in advance!!
> 
> Sophan
> 
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